1. A portable oxygen concentrator is a device that provides oxygen therapy to people who need a higher oxygen concentration than ambient air. 
2. Compared with traditional home oxygen concentrators, portable oxygen concentrators have the advantages of small size, portability, and quietness, and are suitable for use in various scenarios such as home, outdoor, and travel.

1. 7L Home Oxygen Concentrator C1L, this oxygen concentrator is designed to provide a continuous flow of oxygen with a flow range of 1-7 liters per minute. With PSA technology, this oxygen concentrator can provide 30%-93% oxygen concentration, ensuring a stable and reliable oxygen supply.
2. C1L is also compact and lightweight, measuring only 204x214x280 mm and weighing only 4.8 kg. The noise level is less than 45db.